图像处理简单实例［OpenCV 笔记1］

几个入门的简单程序，和对应的CMakeList, 虽然简单重新测一下写一下也是好的。

CMake教程传送门

图像显示

ShowImage.cxx

#include <opencv2/opencv.hpp>

#include <opencv2/highgui/highgui.hpp>

#include <opencv2/imgcodecs/imgcodecs.hpp>

int main(){

    cv::Mat srcImage = cv::imread("1.jpg");

    imshow("Original Image", srcImage);

    cv::waitKey();

    return ;

}

CMakeLists.txt

cmake_minimum_required (VERSION 2.8)

project (ShowImage)

find_package( OpenCV REQUIRED )

include_directories( ${OpenCV_INCLUDE_DIRS} )

# add the executable

add_executable (ShowImage ShowImage.cxx)

target_link_libraries(ShowImage opencv_core opencv_highgui opencv_imgcodecs)

图像腐蚀

ErodeImage.cxx

#include <opencv2/opencv.hpp>

#include <opencv2/highgui/highgui.hpp>

#include <opencv2/imgcodecs/imgcodecs.hpp>

#include <opencv2/imgproc/imgproc.hpp>

int main(){

    // read image

    cv::Mat srcImage = cv::imread("1.jpg");

    // show original image

    imshow("Original Image", srcImage);

    // erode image

    cv::Mat element = getStructuringElement(cv::MORPH_RECT, cv::Size(,));

    cv::Mat dstImage;

    erode(srcImage, dstImage, element);

    // show results

    imshow("Image Erosion", dstImage);

    cv::waitKey();

    return ;

}

CMakeList.txt

cmake_minimum_required (VERSION 2.8)

project (ErodeImage)

# find OpenCV packages

find_package( OpenCV REQUIRED )

include_directories( ${OpenCV_INCLUDE_DIRS} )

# add the executable

add_executable (ErodeImage ErodeImage.cxx)

target_link_libraries(ErodeImage opencv_core opencv_highgui opencv_imgproc opencv_imgcodecs)

图像模糊

BlurImage.cxx

#include <opencv2/opencv.hpp>

#include <opencv2/highgui/highgui.hpp>

#include <opencv2/imgcodecs/imgcodecs.hpp>

#include <opencv2/imgproc/imgproc.hpp>

int main(){

    // read image

    cv::Mat srcImage = cv::imread("1.jpg");

    // show original image

    imshow("Original Image", srcImage);

    // blur image

    cv::Mat dstImage;

    blur(srcImage, dstImage, cv::Size(,));

    // show results

    imshow("Image Blurring", dstImage);

    cv::waitKey();

    return ;

}

CMakeList.txt

cmake_minimum_required (VERSION 2.8)

project (BlurImage)

# find OpenCV packages

find_package( OpenCV REQUIRED )

include_directories( ${OpenCV_INCLUDE_DIRS} )

# add the executable

add_executable (BlurImage BlurImage.cxx)

target_link_libraries(BlurImage opencv_core opencv_highgui opencv_imgproc opencv_imgcodecs)

Canny边缘检测

CannyEdgeDetection.cxx

#include <opencv2/opencv.hpp>

#include <opencv2/highgui/highgui.hpp>

#include <opencv2/imgcodecs/imgcodecs.hpp>

#include <opencv2/imgproc/imgproc.hpp>

int main(){

    // read image

    cv::Mat srcImage = cv::imread("1.jpg");

    // show original image

    imshow("Original Image", srcImage);

    // blur image

    cv::Mat dstImage, edge, grayImage;

    // create a matrix the same size as srcImage

    dstImage.create(srcImage.size(), srcImage.type());

    // convert color image to gray-scale image

    // OpenCV2

    // cv::cvtColor(srcImage, grayImage, cv::CV_BGR2GRAY);

    // OpenCV3

    cv::cvtColor(srcImage, grayImage, cv::COLOR_BGR2GRAY);

    // denoising

    blur(srcImage, dstImage, cv::Size(,));

    // apply Canny operator

    Canny( dstImage, edge, , , );

    // show results

    imshow("Canny Edge Detection", edge);

    cv::waitKey();

    return ;

}

CMakeList.txt

cmake_minimum_required (VERSION 2.8)

project (CannyEdgeDetection)

# find OpenCV packages

find_package( OpenCV REQUIRED )

include_directories( ${OpenCV_INCLUDE_DIRS} )

# add the executable

add_executable (CannyEdgeDetection CannyEdgeDetection.cxx)

target_link_libraries(CannyEdgeDetection opencv_core opencv_highgui opencv_imgproc opencv_imgcodecs)